"Death-Wish for Two, Part 1 of 2"
*Batman fears that someone will try to assassinate David Cain before he can testify in court and reveal who ordered him to murder Vesper Fairchild. He is right - Deadshot is in Gotham, and Batman's going to have his work cut out for him, because Cain doesn't particularly want to live. Nor, realizes Cain, does Deadshot. When Deadshot offers Cain a handcuff key, he instead goes plunging from a great height, taking a G.C.P.D. officer with him. *Source: DCUGuide.com